<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="/login">
    <input   type="hidden" name="userId" th:value="${user.id}" >
    <p>
        <input type="submit" value="预约洗车">
    </p>
    <p>
        <input type="submit" value="成为洗车员">
    </p>
</form>
</body>
</html>